Drill-steel retainer



L. C. BAYLES.

DRILL STEEL RETAINER. APPLICATION FILED MAR.22. 1920.

1,355,806. v Patented Oct. 19,1920.

UNITED STATES PATENT UOFFICE.

- LEWIS o. rhyme, or ms'ron, PENNSYLVANIA, ASSIGNOR '10 mennsornnnunCOMPANY, or JERSEY, crrY, NE JERSEY, A CORPORATION or NEWJERSEY.

DRILL-STEEL RETAINER.

Steel Retainers, of which the following is a v specification.

Fee

This invention relates to drill steel retainers .of the type in which ayoke embraces I the steel and is suitably held or clamped in positionupon the front head of the tool.

The primary object of the present invention is to produce a yokeretainer so constructed that if it is struck by the collar of the drillsteel for instance as the steel comes forward, the yoke tends to bindinstead of beinlg thrown outwardly away from the stee Anbther object ofthe invention is to secure a retainer which is conveniently adjusted andheld by spring pressed means inde endent of the side bolt springs.

urther objects will hereinafter ap ear sired, be'provided' withextensions or (5)1 and the drawings illustrate a preferred orm of theinvention in which* Figure 1 is a side elevation ofthe end of a toolpartly broken away and in vertical section on the line 11 of showing myim roved retainer and Fig. 2 is a si e elevation at right angles tofront partly Fifi: 1.- v

eferring tothe drawings, A represents a portion of the cylinder casin ofa fluid actuated percussive tool, in t is instance a rock drill beingillustrated having the front head Bwithin which the drill steel 0 isadapted to be inserted. The front head B is held to the cylindercasing'A as by means of the usualspring pressed side bolts D.

The drill steel or tool retainer is shown in the form of a yoke Eadapted to embrace the A 'drill'isteel and provided with hook shapedends F :adapted to be seated in suitable means for retaining the yokeupon the tool. 'In accordance with the present invention recessedportions G 'are provided at. each side of the front head and springressed cup shaped supports H are arrange with the tool retainer or okeE. he. loca- .tion and arrangement 0 the recessed portions G and cupshaped supports H are such that the points of contact between the hook.

shaped, ends F of the yoke E and the, sup- A Specification of LettersPatent.

. portions 'with-j in said recessed port ons for coo crating PatentedOct. 1a, 1920.

Application filed March 22, 1920. Serial No. 367,834.

ports H are offset from the longitudinal'axis of the tool as indicatedmore particularly in Fig. 1, so that as the retaining yoke E is forcedor sprung into the position shown in full llnes n Fig. 1 it will beautomatically retained in such position, even if struck by referablyformed with flattened portions and L and the cylinder casing A isprovided with In s or flanges 0 adapted to cooperatewith t eretainer-yoke E and permit the yoke E to be clamped between the lugs Oand the cup shaped supports H.

The cup shaped supports H may, if de-' uners P surrounded b the s rin sfor b the sugport s H As may extend through the apertures R in the en sof the recessed portions G for guiding the plungers. The guiding shanksor extensions could be omitguidingand centerin shown, the plungers Tted' if desired.

In assembling the parts of the retainer, the sprin s Q are inserted inthe recessed from the top and the cup shaped supports with their shanksare also placed in the recessed portions G-from the top. The retaineryoke E may then be quick y adjusted and clamped inposition as indicated'in Fig. 1.

I claim-- 1. A drill steel retainer comprising in com bination with thefront head of the tool, oppositelylocated recessed portions at the sldesof the fronthead, yielding supports. in said recessed portions havin cupshaped sockets offset from the longitu inal axis of the tool, and aretainer in the form of a yoke having 'hook shaped ends adapted to beseated in said cup shaped sockets under projections on the tool casing.

2'. A drill steel retainer, com'rising in combination with the toolcasing, ront head and spring pressed side bolts, of oppositely locatedrecessed portions at the s1des of'the front head, spring 'pressed cupshaped supof contact between said yoke ends and the ports in saidrecessed portions and independcup shaped supports being offset from theent of the side bolt springs, a retainer in the longitudinal .aXis ofthe tool. 10

form of a yoke adapted to embrace the drill In testimony whereof, I havehereunto set 5 steel and having hook shaped ends adapted my hand. v

to be seated in said cup shaped supports under projections on the toolcasing, the points I LEWIS o. BAYLES.

